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The endonasal midline inferior intercavernous approach to the cavernous sinus: technical note, cadaveric step-by-step illustration, and case presentation

  • Technical Note - Neurosurgical Anatomy
  • Published:
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Abstract

Purpose

Traditional endoscopic endonasal approaches to the cavernous sinus (CS) open the anterior CS wall just medial to the internal carotid artery (ICA), posing risk of vascular injury. This work describes a potentially safer midline sellar entry point for accessing the CS utilizing its connection with the inferior intercavernous sinus (IICS) when anatomically present.

Methods

The technique for the midline intercavernous dural access is described and depicted with cadaveric dissections and a clinical case.

Results

An endoscopic endonasal approach exposed the periosteal dural layer of anterior sella and CS. The IICS was opened sharply in midline through its periosteal layer. The feather knife was inserted and advanced laterally within the IICS toward the anterior CS wall, thereby gradually incising the periosteal layer of the IICS. The knife was turned superiorly then inferiorly in a vertical direction to open the anterior CS wall. This provided excellent access to the CS compartments, maintained the meningeal layer of the IICS and the medial CS wall, and avoided an initial dural incision immediately adjacent to the ICA.

Conclusion

The midline intercavernous dural access to the CS assisted by a 90° dissector-blade is an effective modification to previously described techniques, with potentially lower risk to the ICA.

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Fig. 1
Fig. 2

Copyright Mayo Clinic, used with permission of Mayo Foundation for Medical Education and Research, all right reserved. AICS anterior intercavernous sinus, CS cavernous sinus, ICA internal carotid artery, IICS inferior intercavernous sinus, PCP posterior clinoid process, PG pituitary gland, Tub. tuberculum

Fig. 3
Fig. 4

Copyright Mayo Clinic, used with permission of Mayo Foundation for Medical Education and Research, all right reserved. CS cavernous sinus, ICA internal carotid artery, IICS inferior intercavernous sinus, PG pituitary gland

Abbreviations

AICS:

Anterior intercavernous sinus

CCL:

Caroticoclinoidal ligament

CN:

Cranial nerve

CS:

Cavernous sinus

ICA:

Internal carotid artery

IICS:

Inferior intercavernous sinus

IPL:

Inferior parasellar ligament

MR:

Magnetic resonance

PG:

Pituitary gland

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Funding

This work was supported in part by funds from the Johnson Endowed Professorship and Joseph and Barbara Ashkins Endowed Professorship in Surgery.

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Authors and Affiliations

Authors

Contributions

Conceptualization: Maria Peris-Celda, Carlos Pinheiro-Neto; methodology: Maria Peris-Celda, Rima Rindler; formal analysis and investigation: Rima Rindler, Luciano Leonel, Edoardo Agosti; writing—original draft preparation: Rima Rindler, Panagiotis Kerezoudis, Stephen Graepel; writing—review and editing: Maria Peris-Celda, Carlos Pinheiro-Neto; funding acquisition: Maria Peris-Celda; resources: Luciano Leonel, Edoardo Agosti, Stephen Graepel; supervision: Maria Peris-Celda, Carlos Pinheiro-Neto.

Corresponding author

Correspondence to Maria Peris-Celda.

Ethics declarations

Ethics approval

Approval was obtained from the ethics committee of the Mayo Clinic. The procedures used in this study adhere to the tenets of the Declaration of Helsinki.

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Patients signed informed consent regarding publishing their data.

Conflict of interest

The authors declare no competing interests.

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This article is part of the Topical Collection on Neurosurgical Anatomy

Previous presentations: This work was accepted as an oral presentation at the 31st North American Skull Base Society meeting in February 18–20, 2022, Phoenix, AZ.

Supplementary Information

Below is the link to the electronic supplementary material.

Supplementary file1 (MP4 31277 KB) Intraoperative video demonstrating the midline endoscopic endonasal inferior intercavernous sinus approach for biopsy of a lesion in the left cavernous sinus.

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Rindler, R.S., Leonel, L.C., Graepel, S. et al. The endonasal midline inferior intercavernous approach to the cavernous sinus: technical note, cadaveric step-by-step illustration, and case presentation. Acta Neurochir 164, 2573–2580 (2022). https://doi.org/10.1007/s00701-022-05284-w

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  • DOI: https://doi.org/10.1007/s00701-022-05284-w

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